This circuit was obtained from Elektor magazine and published in the Encyclopedia of Electronic Circuits Vol 5 of 1995. Transistors are RF types that are still common today.
Found in a 1980s documentation, this amplifier uses an integrated circuit of the era. The RLC...
This circuit produces a voltage drop in the first pulse, turning off the relay. On the second...
Operational amplifiers or comparators like those in the LM139 series can be used on this circuit,...